diff --git a/internal/pkg/listener/service_test.go b/internal/pkg/listener/service_test.go
index e1a686e..1fa4d35 100644
--- a/internal/pkg/listener/service_test.go
+++ b/internal/pkg/listener/service_test.go
@@ -86,7 +86,7 @@ func Test_handleReorgBlock(t *testing.T) {
 	err = keeper.SetHead(ctx, header, constant.ZeroHash)
 	require.NoError(t, err)
 
-	// pass through two blocks
+	// This causes the gap between the current head in the keeper and the latest head at least two blocks
 	time.Sleep(24 * time.Second)
 
 	header, err = bcClient.GetHeader(ctx)